Unpleasant Co-Worker

I work as the sole designer for a small company dealing with breast cancer patients, I love helping people and I love what I do! I have been with this company for 3 years, longer than anyone else on the current team. Six months ago we brought in a few new employees in the production department. One of these employees has been consistently going out of her way to make inconsiderate remarks about any design concept and artwork I may have, referring to my work as "clip art," among other negative terms. Most of the time she just makes these comments in passing, when I am mid project or consulting someone else. She buds in and rips my work apart and makes fun of it in the process. I felt may have been jealous of my position in the company, so I have reached out and asked her manager if she can assist me on a project, so she can get more time in the design department. That was a huge mistake, since her one contribution she has been consistently talking up that sole project and comparing it to everything else I do as to how much superior it is. I am secure in my skills, on top of many years in the industry, I finished with honors at a prestigious art school and design program and I have had other job offers even in this job market. I realize this person may be jealous but it is really unpleasant and its making for a negative work environment, I take to critcism and I like to improve my work but her comments are neither constructive or respectful. I don't want to be a tattle tale and report her to her manager nor do I want to take her outside and beat her up (just kidding.) Since her joining the company I have begun to dread coming into work and have been trying to hide my work, in an open office, which has proven difficult. I love my job but this is making me want to seek employement elsewhere. Help!